Using Cardboard As a Weed Barrier – 4 Reasons Why!

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Last Updated on October 26, 2022

Using cardboard as a weed barrier in your vegetable garden will help you prevent weeds, making it easier for the plant’s maintenance.

In my experience, there are several factors that can be used to explain why using cardboard in a vegetable garden would be a good idea. It is the purpose of this article to help you understand why this is so and how to use it to your advantage. For the sake of simplicity, we will focus on vegetables that need a lot of space such as tomatoes, peppers, cucumbers, and eggplants.

Why Use Cardboard As a Weed Barrier?

This question might seem to be quite obvious but before we proceed with the explanation, we should know what kind of benefits we can expect from this method. Using cardboard as a weed barrier for a vegetable garden has several advantages compared to other methods. Here is a list of the main ones:

Reason #1: Ease of use

It is very easy to use cardboard as a weed barrier. You don’t have to do anything special, it just works.

Reason #2: Cost-Effective

If you are looking for a cost-effective solution, cardboard is an excellent choice. The material is cheap and you don’t need any special equipment or tools to use it.

Why Use Cardboard As A Weed Barrier

Reason #3: Environmental friendly

Cardboard is biodegradable and you won’t have to worry about any chemicals used in its production. This makes it a very environmentally friendly option.

Reason #4: Versatile

You can use cardboard as a weed barrier in almost every type of garden.

It is not limited to a specific type of garden and you can use it in any kind of soil. The most important advantage of using cardboard as a weed barrier is that it is very easy to use.

You can buy the material from your local store and just lay it out where you want. You don’t have to dig holes, you don’t have to do anything other than laying out the cardboard and it will work like magic!

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How To Use Cardboard As a Weed Barrier

First, you need to prepare the area where you are going to use it. You should clean the soil and remove all weeds.

You generally don’t have to worry if your cardboard has any ink on it as the industry standard ink is soy-based. 

Next, you need to cut the cardboard into pieces according to the size of your garden. The cardboard should overlap 6-8 inches to help block sunlight. Be sure to remove any staples and tape from the cardboard before using.

Now, you need to place the pieces of cardboard in the garden. Make sure they are placed in a way that creates a barrier around the plants. They don’t have to be placed perfectly because this is the most important thing and you can always add more pieces of cardboard later if you find that it isn’t working.

After you are done laying out the pieces of cardboard, you need to cover them with soil, approximately three inches or so. You should do this slowly, adding soil in layers so that it doesn’t compact and break the cardboard pieces.

Once you are finished covering the pieces of cardboard with soil, you can use them as a weed barrier. It will prevent weeds from growing through the garden.

What Kind Of Cardboard is Good For Use As a Weed Barrier?

You can use corrugated cardboard or rolled cardboard called ‘B flute.’ Both are cheap, last a long time, and are easy to install.

You might try some of the old “bulk” cardboard boxes that come from the store. They have a lot of surface area and are inexpensive.

Use cardboard that doesn’t have any toxins of any kind.  Earthworms will enjoy eating the cardboard and in return aerate the soil. The cardboard is fairly easy to remove when need be.

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In Summary, Cardboard As a Weed Barrier

Using cardboard as a weed barrier is an organic way to cover your soil from drying up and keep your garden free from weeds.

This is a really useful tip for those who love gardening and enjoy having their soil free from weeds and also the plants in it. It is also a very cheap way to get your garden looking good.

The best part of using this method is that you can use the cardboard as a support to your plants or you can even make it into a planter. You can also make it into a pot by making a hole in the middle of the cardboard to hold the soil.

The cardboard will help your garden will look really nice and healthy. Another great way to help your soil stay moist without using any chemicals is to plant herbs in your garden.

They help your soil by drawing moisture from the air and they also help your plants by keeping them clean and free from weeds. So if you love gardening and want to try something new, then use cardboard as a weed barrier. If you are looking for a way to control weeds without using any chemicals, then you should try using this technique cardboard as a weed barrier.


Is cardboard good for preventing weeds?

Yes, it works! It prevents weeds from growing because the soil can't absorb moisture. This also helps keep weeds at bay.

Will roots grow through cardboard?

No, they won't. The roots won't be able to penetrate the cardboard. However, the cardboard is organic so it eventually breaks down to the soil and allows the plant to grow through.

Does cardboard under mulch attract termites?

If you have a termite problem, you should be careful if you use cardboard in your garden. Termites enjoy eating cardboard and it can attract them if they are already in the area.

How long does cardboard last weed barrier?

A cardboard barrier lasts as long as the mulch does. If you use weed barrier mulch, the cardboard will not last very long, usually only a few months. It is easy to use and is a good way to keep weeds out of your garden. It won't harm your plants and it is inexpensive.

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